We make the following changes for outbound scanning.
Edit /etc/exim.conf
Look for two instances of:
driver = dnslookup
under dk_lookuphost: and lookuphost:
Comment both instances and add two instances of
driver = manualroute
route_list = * barracuda.outgoing.hostnameso it’ll look something like this:
dk_lookuphost:
#driver = dnslookup
driver = manualroute
route_list = * barracuda.outgoing.hostnamelookuphost:
#driver = dnslookup
driver = manualroute
route_list = * barracuda.outgoing.hostnamethen go to Barracuda management panel and go to Basic -> Authorized Senders and enter main ip address of that cpanel server
and restart cpanel exim and check the exim_mainlog
grep barracuda.outgoing.hostname /var/log/exim_mainlog
http://forums.cpanel.net/f43/smtp-relay-barracuda-140997.html
http://help.comodo.com/topic-157-1-288-4545-.html
http://atmail.com/kb/2009/using-smtp-auth-with-the-exim-smarthost/